U.S. Department of the Interior Scientific Investigations Map 3335 U.S. Geological Survey Pamphlet accompanies map 440000m E 50 136° 46 135°30' 48 135° 52 134°30' CORRELATION OF MAP UNITS

AGE (Ma) STRATIFIED ROCKS INTRUSIVE ROCKS

0.0 Qu Qda Qafr Holocene 0.01 QUATERNARY N Qafd Qafa Qafb Qafu Qr Qa Qb Pleistocene 38 0000m 1 161.4 ± 0.3 Ma 6 2.6 | a Pliocene 38 88 6 5.3 Miocene LT U 2 155 Ma 23.0 Jt A CENOZOIC F Togd S Tif Oligocene E Toet Toetm G 33.9 |a N TERTIARY A R 3 R ^p 48 172.7 ± 1.9 Ma Jt E BARANOF ACCRETIONARY COMPLEX Eocene 57°30' D Tegb Tegd Tet R Qu ^p 57°30' O Sitka Graywacke Kelp Bay Group B 55.8 58 Ts Paleocene 65.5 KJkv ^p TKa TKv 72 ^p T}s 54 Ksv 50 Qu ^p 85 ^p Ks Kss ^p ALEXANDER Jt ^p TERRANE CRETACEOUS 42 4 159.4 ± 1.4 Ma 44 Kt 55 K t A´ KJks Qu ^p 105.0 |sv Jqd KJks KJks T}s F1 Middle or Late Jurassic Kt Qu KJks 80 |sv WRANGELLIA TERRANE |a Qu KJkk 155.8 ± 4 Ma KJkv KJkv Kt 4 8 Qu 145.5 KJkk KJks KJkv 5 154.1 ± 5 Ma KJkv KJks KJkk KJkv Jt Jt KJkk }um Qu KJkk Qu K t 36 36 6 6 |a ^p 85 64 }sc }gn MESOZOIC Jt KJkv KJkk Kt Jqd Qu 77 6 144.3 ± 1.3 Ma KJks KJkk Kt JURASSIC B |a KJkv O KJkk 78 KJkv R Qu KJkv Ks D Qu 50 N E 79 R KJkk KJkk Tet Ks E 70 V KJkk R 7 Jd Ks A 107.9 ± 1.6 Ma A |a T}s KJkv S N KJkv 112.0 ± 1.6 Ma T G KJkk R |a 201.6 Tet A E KJkv I S T ^sv KJkk Qu F Jt KJkv ^m F A A 50 Tif Qu U U ^sv KJks KJkv L L KJkv K Jkv ^g T T 26 ^p ^sv Tet Qu KJkk ^m 75 KJkk TRIASSIC KJkk T}s Qu F2 Late Tithonian (Late Jurassic) 54 62 Ks KJkk C Qu Ks KJkk P H KJkk 76 E A KJkv KJkk KJks R T 251.0 Jd KJkk I Tet Ks L H KJkk Qu KJkk A ^sv Jd KJkv S ^sv 7 T M Qu KJkk R 57°15' KJkv Qu F3 Middle Devonian to Permian 18 A S 57°15' Qu I T J d 67 ^ g KJks T R Tet |sv |sv KJkk KJkk F KJkk A A PERMIAN Ks K Jkk ^sv F4 Carnian (Late Triassic) U I KJkk T ^m L Ks T Jd Jd Toet 81 F Jd ^m 66 A 34 U Jd Qu Toet KJkk KJkk L KJkk T 34 Jd 34 6 Ks 60 6 299.0 9 Qu KJkk KJkk Tet 8 157.2 ± 2.6 Ma ^sv 49.8 ± 1.3 Ma 10 Qafu Ks Jd KJks PENNSYLVANIAN Ks 185.4 ± 3.8 Ma ^sv 56 438 ± 18 ka 11 192.8 ± 2.4 Ma 43.6 ± 1.1 Ma Qu 12 45.4 ± 1.2 Ma 318.1 ^sv KJkk Ks 13 48.5 ± 1.1 Ma Jd Jd Jd Qu 14 Tet Tet KJks Qafu 313 ± 14 ka KJkk 80 Tet Tet Tet Qu Toet |sv |a MISSISSIPPIAN Tet KJkk Jd KJkk Qafb Ks 65 KJkk }sc KJkk KJkk KJkk Toet Qb ^sv 46 }gn Toetm Ks Jd ^sv KJkk Qa Ks 15 191.9 ± 1.2 Ma 16 42.3 ± 1.0 Ma 359.2 Qafa F5 Qu Late Tithonian Toetm 5760 ± 70 yr BP 18 }sc Toetm Ks Valanginian to Hauterivian ^sv 17 F6 19 9150 ± 150 yr BP Qb Qu }gn }gn 49 ± 35 ka KJkk discordant 9180 ± 150 yr BP Qafu }sc 20 Qb Qb 566 ± 43 ka 22 41.2 ± 0.3 Ma 32.4 ± 0.3 Ma DEVONIAN PALEOZOIC 23 Toet 52 24 297 ± 27 ka KJkk 41.1 ± 0.8 Ma Ks ^sv }gn 25 Qb 26 567 ± 111 ka Ks 42.2 ± 0.8 Ma Qu }gn Qa 28 28 ± 8 ka 27 28.9 ± 0.2 Ma Qr 80 Ks KJkk Qu Toet 416.0 A Qu Ks Toet Qda 21 611 ± 74 ka Toet 36 ± 7 ka 29 16 ± 5 ka KJkk 30 28.7 ± 1.3 Ma ? ? 4310 ± 146 yr 32 31 137 ± 42 ka Jd 34 Ks Qu 4030 ± 90 yr Qr 35 36 Toet Qafa 38 21 ± 13 ka KJkk >100 Ma 81 37 58 ± 17 ka Ksv 8570 ± 300 yr BP ^sv }gn 189 ± 51 ka 39 33 45 ± 63 ka Ks Ks ^sv T}s ^sv }gn Toet 40 39.6 ± 0.9 Ma WRANGELLIA TERRANE Qb Qu Ks KJkk ABBREVIATED DESCRIPTION OF MAP UNITS Qafd ^sv }gn ^sv ^sv ^m 95 ± 26 ka 41 Qafr Toet Metalimestone (Late Triassic)—Light-gray, bedded metalimestone, rusty impure metalime- Qafa Qa dz 67 KJkk Toet [See Description of Map Units (in pamphlet) for complete unit descriptions and age information] Qb Toet stone, and white marble. Locally contains greenstone lenses 103 Ma Toet Toet

32 Ks Toet 32 6 Qafu Toet 42 ^sv Qu 6 ^g Goon Dip Greenstone (Triassic)—Massive greenstone up to several hundred meters in dz 66 }gn STRATIFIED ROCKS Qb Qb KJkk Qb 105 Ma 48.3 ± 1.3 Ma Toet thickness contains vesicles and calcite-filled amygdules. Subordinate pillow breccia and K s 75 Toet Qu Unconsolidated deposits, undivided (Quaternary)—Alluvial, colluvial, tidal, glacial, and Qb dz 65 tuff. Primary minerals include rare phenocrysts of plagioclase and hornblende or augite. 57° 44 KJkk 57° glacial-marine deposits 43 410 ± 55 ka Ks 74 Ma Toet Jurassic (?) Metamorphic minerals include chlorite, epidote, actinolite, prehnite, and pyrite 87 ± 5 ka Qa F7 dz 69 97 Ma S To et Qda Dacite flows of Crater Ridge (Holocene)—Dark-brownish-gray, vesicular to diktytaxitic, Ks IL ^sv Metasedimentary and metavolcanic rocks (Triassic)—Gray and green metavolcaniclastic VE KJkk R ^sv plagioclase-phyric dacite; massive with local subtle flow variation dz 64 Ks B }gn rocks interlayered with metamudstone, metachert, metalimestone, and metabasite. Litholo- 74 Ma AY 45 35.1 ± 0.3 Ma Qafr F Qu ^sv } sc Pyroclastic flow deposits of Crater Ridge (Holocene)—Poorly sorted silt, sand, low-silica gies are interlayered. Secondary minerals include epidote, albite, magnetite, pyrite, and Qu AU LT ^sv 36 rhyolite pumiceous lapilli, and blocks of dark-gray, aphyric to sparsely porphyritic chalcopyrite. Stipple pattern indicates areas of hornfels near contacts with plutons F8 Silurian to Eocene KJkk T }s vitrophyre. Pyroclastic flows contain up to 50% by volume lithic clasts that range up to 1 |sv Metasedimentary and metavolcanic rocks of Nakwasina Sound (Paleozoic)—Light-green, dz 63 46 Toet m in size 72 Ma Ks Qu tan, buff, and white, felsic and calcareous semischist, quartzite, metatuff, volcanic breccia, Ks 49.4 ± 0.5 Ma Ks T}s Qafd Dacite air-fall tuffs of Mount Edgecumbe (Pleistocene)—Dark-gray and red-brown scoria- and marble. Relict sedimentary layering is locally preserved. Contains centimeter-scale dz 62 56 Toet 74 Ma 47 44.0 ± 0.5 Ma ceous lapilli, breccia, foliated vitrophyre, and ash. Lapilli are more than 75% yellow to 36 Ks 31.6 ± 0.2 Ma bands of garnet-diopside-biotite schist 48 brown glass. On the rim of Mount Edgecumbe, deposit is compacted and agglutinated into Qu 49 34.6 ± 0.3 Ma |a Amphibolite (Paleozoic)—Dark-greenish-gray banded amphibolite with subordinate marble Ks }sc Ks Tet banded vitrophyre more than 50 m in thickness. Identified as far away as Juneau 50 37.0 ± 0.4 Ma lenses up to 50 m in thickness. Centimeter-scale bands in amphibolite are composed of T}s Qafa Andesitic air-fall tuffs of Mount Edgecumbe (Pleistocene)—Gray scoriaceous lapilli form Ks Toet Toet alternating hornblende-plagioclase and biotite-hornblende-andesine-quartz±almandine T}s ^sv deposits greater than 50 m in thickness near vents, identified as far as 30 km from Mount Ks 75 garnet Edgecumbe Ks Qafb Basaltic air-fall tuffs of Mount Edgecumbe (Pleistocene)—Rusty orange-brown scoriaceous INTRUSIVE ROCKS Ks Ks Toet Qu ^m lapilli mapped near vents where deposits are at least 50 m in thickness Tif Felsic intrusive rocks (Tertiary)—Very light gray to buff aplite and fine-grained granitic rock. Tegd Ks KJkk 51 45.4 ± 1.6 Ma Qafu Undifferentiated pyroclastic deposits of Mount Edgecumbe (Pleistocene)—Reddish- to Ks Contains less than 5% biotite and pyrite Qu 32 yellowish-brown lapilli and ash Tegd Tegd 62 }um Togd Granodiorite of Gut Bay (Oligocene)—Light-gray, medium-grained, hypidiomorphic, Qr Rhyolite dome of Crater Ridge (Pleistocene)—Dark-gray, sparsely plagioclase and pyroxene Tet hornblende-biotite granodiorite. Hornblende approximately equal to biotite in abundance. Tet KJkk 30 30 T egd porphyritic, pilotaxitic, low-silica rhyolite with scattered vesicles and near-vertical 6 6 T}s Not magnetic foliation Tegd 35 52 50.1 ± 0.1 Ma Jd Toet Tonalite (Oligocene to Late Eocene)—Light-gray, medium-grained, hornblende-biotite Tegd 48.0 ± 1.4 Ma Qu Tegd 53 T}s 52 Qa Andesite and basaltic andesite flows of Mount Edgecumbe (Pleistocene)—Banded to tonalite, with subordinate granodiorite and trondjhemite. Not magnetic. Contains up to 5% Tet 48.3 ± 1.4 Ma KJkk 30 80 thin-plated, dark-gray andesite and high-silica basaltic andesite—plagioclase, pyroxene, red almandine garnet Tet Tegd ^sv Tegd and olivine subseriate porphyritic or glomeroporphyritic—with trachytic, pilotaxitic, or Toetm KJkk Migmatite (Oligocene to Late Eocene)—Gray, black, and white irregularly banded gneiss, T et hyalophytic groundmass agmatite, and inhomogenous granitic rock with rafts of host rock, laced with leucocratic Tegd Qb Basalt flows of Mount Edgecumbe (Pleistocene)—Massive, dark-gray, vesicular, plagioclase, neosome. Associated with unit Toet Tet Tegd T}s olivine, and clinopyroxene porphyritic basalt flows, with intercalated breccia and aquagene Qu Tegb Gabbro (Eocene)—Dark-gray, coarse-grained, massive gabbro and norite altered to a mineral Tegd tuff assemblage of hornblende, albite, magnetite, and apatite. Gabbro has massive-sulfide 55 47.9 ± 0.5 Ma 54 45.3 ± 1.1 Ma Qu ^sv lenses that contain nickeliferous pyrrhotite, chalcopyrite, and pentlandite TKa Tegd BARANOF ACCRETIONARY COMPLEX Tet Tet Tegd KJkk Tegd Granodiorite (Early Eocene)—Light-gray, massive, medium-grained, seriate biotite granodio- 56°45' TKa Qu Ts Sandstone of Whale Bay (Paleocene)—Light-gray, medium- to fine-grained sandstone and Qu 56°45' rite. Locally plagioclase porphyritic. Gradational to biotite-hornblende tonalite. Accessory TKa TKa Tegd Togd dark-gray argillite, sandstone-mudstone turbidite beds, massive sandstone beds, and F Tet Tet sphene, apatite, zircon, opaques, and rare allanite. Contains abundant inclusions of host A 50.5 ± 0.3 Ma KJkk 56 70 polymictic conglomerate. Sandstone contains quartz, plagioclase, potassium feldspar, I rock R Tet Tet Tet 58 24.9 ± 1.6 Ma 25.5 ± 0.5 Ma detrital biotite, white mica, chlorite, carbonate, epidote, amphibole, chert, and volcanic, W Kss 57 Te t Tegd Togd 31.9 ± 0.5 Ma Tet Tonalite (Early Eocene)—Light-gray, medium-grained biotite-hornblende tonalite, gradational E plutonic, and metamorphic rock fragments. Locally contains secondary biotite, garnet, and 59 26.7 ± 0.3 Ma A TKa to granodiorite, quartz monzonite, and quartz diorite. Some phases contain muscovite or T 45.4 ± 0.4 Ma Togd andalusite 88 60 Togd H Tet 42 pyroxene. Crosscut by late alaskite phases containing oligoclase, microcline, biotite, E 61 26.4 ± 0.6 Ma TKa Argillite of Necker Bay (Tertiary and Cretaceous)—Dark-gray argillite has semischistose R 41.1 ± 0.8 Ma muscovite, and garnet. Not magnetic Kss ^sv Togd 83 62 42.2 ± 0.8 Ma fabric and locally retains primary bedding structures. Argillite includes thin interbeds of F Tegd TKa T}s Serpentinite (Tertiary and (or) Mesozoic)—Yellowish-brown-weathering clinopyroxene- A sandstone and limestone, and teconic blocks of sandstone, chert, limestone, and green- Tet U Ts Kss stone. Locally contains secondary pyrite, white mica, biotite, garnet, and andalusite antigorite and talc-tremolite-chrysotile serpentinite. Lenticular bodies range from meter to L lusite T Tegd TKa kilometer scale. Mainly associated with the Silver Bay and Patterson Bay Faults. May be Anda TKv S ^g Volcanic rocks of Port Alexander (Tertiary and Cretaceous)—Dark-green mafic volcanic 63 Tet associated with faults or may be derived from unit }um. Y Ts T s 67 rocks depositionally interlayered with sandstone and argillite. Unit includes massive and S 28 28 6 6 }um Ultramafic rocks (Mesozoic)—Red-weathering, black, fine-grained dunite and clinopyrox- T 46.8 ± 1.4 Ma amygdaloidal tholeiitic basalt flows, pillow flows, breccia, and thick sills. Locally contains E enite, including wehrlite. Dunite and clinopyroxenite are layered or irregular masses, but M ^g secondary actinolite, biotite, chlorite, epidote, garnet, and calcite Ts are not zoned. Contains chromian spinel layers and lenses, and secondary magnetite Tet Ks Sitka Graywacke (Cretaceous)—Tan-weathering, light-gray, medium- to fine-grained Ts Garnet Tet graywacke and dark-gray argillite, including graded turbidite beds, amalgamated massive ALEXANDER TERRANE Ts Ts Sillimanite sandstone beds greater than 10 m thick, and polymictic conglomerate. Graywacke contains Kss Kt Tonalite (Early Cretaceous)—Medium-gray to greenish-gray, medium-grained, hornblende Ts quartz, plagioclase, potassium feldspar, detrital biotite, white mica, and chlorite, carbonate, tonalite, quartz diorite, diorite, leucogabbro, and gabbro. Heterogenous composition and Tet epidote, amphibole, chert, and volcanic, plutonic, and metamorphic rock fragments. texture. Hypidiomorphic granular; locally layered, locally foliated. Contains primary Ts 64 43.9 ± 0.3 Ma Ts Stipple pattern indicates areas of hornfels in contact aureoloes of plutons TKa KJkk KJkk quartz, plagioclase, hornblende, and biotite with rare augite and olivine. Secondary TKa Kss Semischistose Sitka Graywacke (Cretaceous)—Gray, banded, foliated metagraywacke and 65 46.1 ± 0.7 Ma Qu minerals include calcite, sericite, chlorite, sphene, prehnite, magnetite, and serpentine Tet metamudstone contains biotite, almandine garnet, andalusite, and sillimanite. Locally, 80 primary depositional structures are preserved. Folds and mineral lineations predate WRANGELLIA TERRANE intrusion of Eocene plutons 72 Jt Tonalite (Late Jurassic)—Gray-green, massive, medium-grained biotite-hornblende tonalite. Ksv Volcanic rocks of Sitka Graywacke (Cretaceous)—Dark-green mafic volcanic rocks Hypidiomorphic and seriate phases. Primary minerals include quartz, plagioclase, biotite, Ts interlayered with sandstone of the Sitka Graywacke as massive flows, pillowed flows, hornblende, and accessory muscovite, garnet, and sphene. Secondary minerals include TKa volcanic breccia, and sills calcite, albite, prehnite, epidote, chlorite, sericite, and magnetite 58 Kelp Bay Group (Mesozoic) Jqd Quartz diorite (Middle Jurassic)—Green, medium- to fine-grained hornblende quartz diorite Qu and diorite. Secondary minerals include epidote, chlorite, pyrite, and chalcopyrite KJkk Khaz Complex (Cretaceous and Jurassic)—Dark-gray slatey argillite chaotically mixed with green volcaniclastic material contains clasts and blocks of sedimentary, volcanic, Jd Diorite (Early Jurassic)—Green, medium-grained, biotite-hornblende diorite. Pervasively Qu plutonic, and metamorphic rocks. Clasts are matrix supported. Locally contains depos- altered to chlorite, actinolite, and epidote. Locally foliated. Locally pervasive shear and 56°30' 56°30' tional lenses of tuff, chert, sandstone, limestone, and mafic volcanic rock. Stipple pattern cataclasis indicates areas of hornfels in contact aureoles of plutons

P 26 26 A KJks 6 6 50 Sandstone (Cretaceous and Jurassic)—Greenish-gray or brownish-gray volcaniclastic 65 T EXPLANATION OF MAP SYMBOLS T wacke, dark-gray argillite turbidites, and subordinate poly-mictic conglomerate. Wacke 66 45.4 ± 0.4 Ma Qu E Ts contains primary quartz and volcanic rock fragments, altered plagioclase, and secondary Contact—Solid where location is accurate; dashed where location is approximate; dotted where Ts R S calcite, epidote, chlorite, sericite, and pyritez location is concealed Ts O N KJkv Volcanic rocks and chert (Cretaceous and Jurassic)—Dark-green mafic volcanic rocks, Ts Faults—Solid where location is accurate; dashed where location is approximate; dotted where 55 Ts 62 B locally pillowed, include lenses of red, green, or gray ribbon chert, and interlayered location is concealed A

52 Y sandstone or mudstone. Volcanic rocks contain primary plagioclase and clinopyroxene; Garnet 80 Tegb High-angle fault—Arrows show relative motion 41 F secondary chlorite, epidote, albite, calcite, quartz, prehnite, and pumpellyite 67 43.9 ± 0.3 Ma Qu A TKv U }sc Schist (Mesozoic)—Dark-gray, banded to massive, biotite schist and quartz-biotite schist. Thrust fault—Sawteeth on upper plate Ts L T Contains quartz, plagioclase, muscovite, garnet, staurolite, andalusite, and sillimanite Andalusite Qu Relative fault movement—Only on cross section TKa }gn Gneiss (Mesozoic)—Gray and white, fine- to medium-grained, centimeter-banded, quartzo- Toward Qu feldspathic biotite gneiss and hornblende plagioclase gneiss. Contains quartz, plagioclase, Qu Away Ts 68 76 58 garnet, biotite, hornblende, staurolite, andalusite, sillimanite, and cordierite Ts Tet Garnet Metamorphic isograd 45.1 ± 0.9 Ma 12 ^p Pinnacle Peak Phyllite (Triassic)—Black, carbonaceous phyllite alternates with light-green phyllite, metachert, and thin black marble. Metamorphic minerals in gray phyllite include Hornfels in contact aureoles 69 44.2 ± 0.9 Ma quartz, graphite, chlorite, calcite, white mica, and pyrite. Green phyllite contains quartz, Bedding albite, sericite, clinozoisite, chlorite pseudomorphs of garnet, and actinolite Tet 40 Kss Inclined—Showing strike and dip 58 58 Overturned—Showing strike and dip TKa 71 70 51.6 ± 0.3 Ma Foliation 72 ~51 Ma ± 0.3 Ma 7 50.2 ± 0.9 Ma 7 Kss 18 Inclined—Showing lineation

Ts 74 T e t Ts Vertical—Showing strike 24 24 6 Tet 6 Sample locality—Showing sample locality number (bold) and age TKv Ts 14C—See table 1 Tet Tet Ts TKv K-Ar—See table 1 Ts 40Ar/39Ar—See table 1 Tet Tka Kss U-Pb—Magmatic zircon age. See table 1 56°15' Ts TKv 56°15' 62 58 U-Pb—Detrital zircon youngest age. See table 2 73 41.2 ± 0.3 Ma TKa Fossil—See table 3 Ts Glacier Photograph showing Crawfish Inlet Pluton and argillite host rocks, Great Arm of Whale Bay, Baranof Island.

136°W 135°W 136°W 135°W 136°W 135°W 74 35.5 ± 1.2 Ma 70

Berg and TKv . . Hinckley, 1963 ......

N ...... 22 . . .. 0000m 6 ...... 22 6 . . 44 46 135°30' 48 135° 520000m E 134°30' Loney, Brew, 50 . . Muffler, and 19 1/ ° . Pomeroy, 1975 Base from U.S. Geological Survey, 1:250,000: Sitka, 1951 with minor 2 SCALE 1:200 000 Geology by S.M. Karl 1978-1999, with J.E. Decker 1978, D.A. Sitka ! Sitka ! ! revisions in 1987 and Port Alexander, 1951 with minor revisions in 4 0 4 8 12 16 MILE Brew 1980-1987, Sarah Roeske 1991-1992, P.J. Haeussler . Sitka 57°N 1994. 1992-1999, R.L. Loney, 1994, G.R. Himmelberg 1994-1999, and .

57°N Reihle, Brew, Universal Transverse Mercator, zone 8 north, NAD 1983 4 0 4 8 12 16 20 KILOMETER C.L. Zumsteg 1999. and Lanphere, Guild and Balsley, 1942 GIS database and cartography by E.E. Thoms, K.A. Labay, 1989 CONTOUR INTERVAL 200 FEET and D. Grunwald Himmelberg and Loney, 1995 NATIONAL GEODETIC VERTICAL DATUM OF 1929 APPROXIMATE MEAN Edited by J.L. Zigler . DECLINATION AT CENTER OF MAP, 2015 Manuscript approved for publication June 9, 2015

. .

WRANGELLIA TERRANE ALEXANDER TERRANE Alexander terrane SW BARANOF ACCRETIONARY COMPLEX BARANOF ACCRETIONARY COMPLEX NE . Wrangellia terrane A A´ PATTERSON BAY FAULT Baranof Accretionary Complex . . FEET FEET . BORDER RANGES FAULT KJkk T}s PERIL STRAIT FAULT 4,000 CHATHAM 4,000 Tertiary plutons . Station locations Qafr Qafu Qafb ^sv KJkv STRAIT FAULT 2,000 Qb ^g KJkv ^p Kt 2,000 SEA LEVEL SEA LEVEL Quaternary volcanic rocks KJkk Ridge, road, stream, or skiff traverse 2,000 Qb KJkk KJkk KJkv KJkk KJkv 2,000 KJkk Jd Jd KJkk 4,000 Ks Tet Ks Jd KJks KJkk Kt 4,000 6,000 |sv |sv KJkk 6,000 136°W 135°W 136°W 135°W 136°W 135°W INDEX MAP SHOWING TECTONIC TERRANES AND INDEX MAP SHOWING STATION LOCATIONS AND INDEX MAP SHOWING SUPPLEMENTAL SOURCES Unconsolidated deposits not shown. See pamphlet for discussion of accretionary complex and terranes. CENOZOIC IGNEOUS ROCKS TRAVERSES MADE DURING THIS STUDY OF GEOLOGIC MAPPING

Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government Geologic Map of Baranof Island, Southeastern Alaska For sale by U.S. Geological Survey, Information Services, Box 25286, Federal Center, Denver, CO 80225, 1–888–ASK–USGS Digital files available at http://pubs.usgs.gov/sim/3335. 1U.S. Geological Survey By 2 Suggested citation: Karl, S.M., Haeussler, P.J., Himmelberg, G.R., Zumsteg, C.L., Layer, P.W., Friedman, Department of Geology, University of Missouri R.M., Roeske, S.M., and Snee, L.W., 2015, Geologic map of Baranof Island, southeastern Alaska: U.S. 3Geophysical Institute, University of Alaska 1 1 2 2 3 4 5 5 Geological Survey Scientific Investigations Map 3335, pamphlet 82 p., http://dx.doi.org/10.3133/sim3335. 4 Susan M. Karl , Peter J. Haeussler ,Glen R. Himmelberg , Cathy L. Zumsteg , Paul W. Layer , Richard M. Friedman , Sarah M. Roeske , and Lawrence W. Snee Department of Earth and Ocean Sciences, University of British Columbia ISSN 2329-132X (online) 5 Department of Geology, University of California Davis 2015 http://dx.doi.org/10.3133/sim3335